Membrane catalyst layer assembly with reinforcing films, membrane electrode assembly with reinforcing films, and polymer electrolyte fuel cells

A membrane electrode assembly with reinforcing films comprising:

• a solid polymer electrolyte membrane;
• a catalyst layer formed on each surface of the electrolyte membrane;
• a gas diffusion layer formed on each of the catalyst layers;
• and
• a frame-shaped reinforcing film with a central opening, the reinforcing film being located on each surface of the membrane electrode assembly having the electrolyte membrane, catalyst layers, and gas diffusion layers, in such a manner that each gas diffusion layer, except for an outer edge portion thereof, is exposed through the opening;
• each of the reinforcing films comprising a first bonding layer bonded to the electrolyte-electrode assembly, and a gas barrier layer formed on the first bonding layer to prevent passage of a fuel gas and an oxidant gas.